Shift knob cover



FIG. 1 is a perspective elevational view of a shift knob cover showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4. is a right side elevation view thereof;

FIG. 5. is left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines, where present, illustrate portions of the shift knob cover that represent environment of the claimed design, and form no part of the claimed design. 

CLAIM The ornamental design for a shift knob cover, as shown and described. 